car was sitting in garage for a year.Put new ignition and fuel pump.Driving the car home it seemed it had no power. Like running on 3 cylinders. what is problem.

I would siphon that nasty old gas out of the tank. That ethanol crap ruins everything. It turns a nasty yellow color. Then I would change the fuel filter and plugs. Put in new gas and see how she goes. Might not hurt to mist down the plug wires with a spray bottle and see if she bogs down. Could have bad wires.